Labour's net zero obsession is costing cash-strapped families more than £500 a year, the Tories claim.
A major analysis found that the price of pursuing the policy would cost the country £320bn by 2050.
A strategy that instead prioritised cheaper energy but resulted in nearly 80per cent clean power would save consumers significant amounts of money, it found.
It comes as Andy Burnham faces a decision on whether to approve two controversial drilling projects in the North Sea.
The Prime Minister has said that he wants to give voters 'breathing space' and has announced a cut in VAT on electricity bills.
However, UK electricity prices rank among the highest in the developed world and have been pushed up by global conflicts.
The report by the think tank Onward found that an approach which focused on reducing the cost of energy would make Britain's electricity a third cheaper by 2050.
It examined a 'Cheap Power' system that would use a bit more gas, a lot more nuclear and far fewer renewables than the current strategy.
Andy Burnham must soon choose whether or not to approve production from a large untapped oil field west of Shetland
Ed Miliband pictured, alongside Burnham, when he was named foreign minister last month
How should Britain balance affordable energy for families with ambitious climate goals?
The policy is likely to be adopted by the Tories who have already pledged to remove taxes on energy bills as well as drilling in the North Sea.
A report on the true price of renewables was first commissioned by former energy secretary Claire Coutinho when the Tories were in power.
She ordered it after discovering that the hidden costs – back-up power, grid balancing and building extra capacity – were not accounted for.
Her successor Ed Miliband cancelled the work when Labour won the election, but it has now been completed by Onward and advisory firm Transpira Energy.
The Tory-leaning think tank Onward modelled the cost of continuing on the path to Net Zero against a strategy of focusing on reducing the cost of electricity.
It worked out that the second scenario could be £540 a year cheaper for households by 2050 – and yet would result in nearly 80per cent clean energy.
It would also make the cost of electricity a fifth cheaper by 2035 and a third cheaper by 2050, prompting consumers to favour electricity.
The authors of the report concluded that the Government's approach to the electricity sector was 'incoherent'.
'It is rushing to decarbonise the power sector with intermittent renewables, whilst ignoring many of the extra system costs that this entails, particularly the costs of building extra transmission and balancing the grid,' it said.
'This approach is driving up electricity prices. The government is simultaneously pushing consumers and businesses to adopt electrification technologies, whilst making the electrical input more expensive.'
Kemi Badenoch, the Tory leader, said that the report offered a 'common sense' approach and said the current strategy should be abandoned.
'Britain needs a serious plan to deal with climate change. Seriousness means looking at results, not simply setting targets and congratulating ourselves afterwards,' she said.
'Current Net Zero targets have driven up energy costs, weakened our industrial base, and made us more dependent on energy imports, while doing too little to make the country more resilient to floods, droughts, and other consequences of the changing climate.
'This report shows what a common-sense approach looks like.'
It comes as the Prime Minister faces a decision over whether to approve the Rosebank and Jackdaw oil and gas fields in Scotland.
He said this should be contingent on introducing wholesale price controls and urged the Party not to row back on net zero commitments.
Reaching net zero by 2050 was introduced by the Conservative government under Theresa May in 2019.
Labour has continued the drive and is aiming to make the grid 95per cent carbon-free by 2030.
But the Tories argue that it is 'impossible' to meet the target and have pledged to scrap green levies and repeal the Climate Change Act.
Energy Secretary Miatta Fahnbulleh said of the report: 'By following Reform's lead, the Tories will tie Britain to the fossil fuel rollercoaster and keep bills higher for families.'
She said that Labour was investing in more clean energy jobs and cutting tax on electricity bills 'to give families breathing space'.
She added: 'As global fossil fuel prices continue to rise amid conflict overseas and wildfires rage across the UK, we can't turn our back on clean power.
'That won't bring down bills and it won't address the climate crisis. The Tories don't have a clue.'